Examples of correct and incorrect identification answers:
1. Correctly entered 159 as choice
2. Correctly entered 12 as 012
3. Incorrectly entered 1 and 9 in the same column. Can be corrected because answer is written on top line.
4. Left out first digit. Should be 058 instead of 58. Can be corrected.
5. Unclear if the answer is 017 or 170. This invalid entry cannot be corrected.
6. Unclear if the answer is 209 or 290. This invalid entry cannot be corrected.